TABLE OF CONTENTS. Air Conditioner CS-NE7GKE CU-NE7GKE CS-NE9GKE CU-NE9GKE CS-NE12GKE CU-NE12GKE

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1 Order No. MAC C2 Air Conditioner CS-NE7GKE CU-NE7GKE CS-NE9GKE CU-NE9GKE CS-NE12GKE CU-NE12GKE TABLE OF CONTENTS PAGE 1 Safety Precaution Specifications CS-NE7GKE CU-NE7GKE CS-NE9GKE CU-NE9GKE CS-NE12GKE CU-NE12GKE Features Location of Controls and Components Product Overview Dimensions Indoor Unit Outdoor Unit Refrigeration Cycle Diagram Block Diagram Wiring Connection Diagram Indoor Unit PAGE 8.2. Outdoor Unit Electronic Circuit Diagram Indoor Unit Outdoor Unit Printed Circuit Board Indoor Unit Outdoor Unit Installation Instruction Select The Best Location Indoor/Outdoor Unit Installation Diagram Indoor Unit Outdoor Unit Operation and Control Basic Function Protection Control Panasonic HA Air-Conditioning (M) Sdn. Bhd. (11969-T). All rights reserved. Unauthorized copying and distribution is a violation of law.

2 13 Servicing Mode Auto OFF/ON Button Select Remote Control Transmission Code Remote Control Button Troubleshooting Guide Refrigeration Cycle System Breakdown Self Diagnosis Function Error Codes Table Disassembly and Assembly Instructions Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures Outdoor Electronic Controller Removal Procedure Technical Data Operation Characteristics Sensible Capacity Chart Exploded View and Replacement Parts List Indoor Unit Outdoor Unit Safety Precaution Read the following SAFETY PRECAUTIONS carefully before perform any servicing. Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit for the model installed. The caution items stated here must be followed because these important contents are related to safety. The meaning of each indication used is as below. Incorrect installation or servicing due to ignoring of the instruction will cause harm or damage, and the seriousness is classified by the following indications. This indication shows the possibility of causing death or serious injury. This indication shows the possibility of causing injury or damage to properties. The items to be followed are classified by the symbols: This symbol denotes item that is PROHIBITTED from doing. Carry out test running to confirm that no abnormality occurs after the servicing. Then, explain to user the operation, care and maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference. 1. Engage dealer or specialist for installation and servicing. If installation or servicing done by the user is defective, it will cause water leakage, electrical shock or fire. 2. Install according to this installation instruction strictly. If installation is defective, it will cause water leakage, electrical shock or fire. 3. Use the attached accessories parts and specified parts for installation and servicing. Otherwise, it will cause the set to fall, water leakage, fire or electrical shock. 4. Install at a strong and firm location which is able to withstand the set's weight. If the strength is not enough or installation is not properly done, the set will drop and cause injury. 5. For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire. 6. Use the specified cable and connect tightly for indoor/outdoor connection. Connect tightly and clamp the cable so that no external force will be acted on the terminal. If connection or fixing is not perfect, it will cause heat-up or fire at the connection. 7. Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will cause heat-up at connection point of terminal, fire or electrical shock. 8. When connecting the piping, do not allow air or any substances other than the specified refrigerant to enter the refrigeration cycle. Otherwise, this may lower the capacity, cause abnormally high pressure in the refrigeration cycle, and possibly result in explosion and injury. 9. Thickness of copper pipes used must be more than 0.6 mm. Never use copper pipes thinner than 0.6 mm. 10. It is desirable that the amount of residual oil is less than 40 mg/10 m. 11. Do not modify the length of the power supply cord or use of the extension cord, and do not share the single outlet with other electrical appliances. Otherwise, it will cause fire or electrical shock. 2

3 1. The equipment must be earthed. It may cause electrical shock if grounding is not perfect. 2. Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of the unit, it may cause fire. 3. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the furniture. 4. Pb free solder has a higher melting point than standard solder; typically the melting point is F (30-40 C) higher. Please use a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ± 20 F (370 ± 10 C).Pb free solder will tend to splash when heated too high (about 1100 F/600 C). 5. Tighten the flare nut with torque wrench according to specified method. If the flare nut is over tightened, after a long period, the flare may break and cause refrigerant gas leakage. 6. Do not touch outdoor unit air inlet and aluminium fin. It may cause injury. 1. Selection of the installation location. Select an installation location which is rigid and strong enough to support or hold the unit, and select a location for easy maintenance. 2. Power supply connection to the conditioner. Connect the power supply cord of the air conditioner to the mains using one of the following methods. Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency. In some countries, permanent connection of this room air conditioner to the power supply is prohibited. 1. Power supply connection to the receptacle using a power plug. Use an approved power plug with earth pin for the connection to the socket. 2. Power supply connection to a circuit breaker for the permanent connection. Use an approved circuit breaker for the permanent connection. It must be a double pole switch with a minimum 3.5 mm contact gap. 3. Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigeration parts. Take care of the liquid refrigerant, it may cause frostbite. 4. Installation work. It may need two people to carry out the installation work. 5. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc. 3

4 2 Specifications 2.1. CS-NE7GKE CU-NE7GKE ITEM UNIT INDOOR UNIT OUTDOOR UNIT Performance Test Condition EUROVENT C kw 2.05 (0.60 ~ 2.40) Capacity O kcal/h 1760 (520 ~ 2060) O W/W 4.46 (5.00 ~ 4.29) L EER I kcal/hw 3.83 (4.33 ~ 3.68) N db (A) High 37, Low 24, Q-Lo 21 High 45 G Noise Level Power level db H kw 2.80 (0.60 ~ 4.00) Capacity E kcal/h 2410 (520 ~ 3440) A W/W 4.52 (5.22 ~ 4.35) T COP I kcal/hw 3.89 (4.52 ~ 3.74) N db (A) High 38, Low 25, Q-Lo 22 High 46 Noise Level G Power level db Moisture Removal l/h 1.3 pt/h 2.7 Lo m 3 /min (ft 3 /min) Cooling; 6.4 (230) Heating; 6.8 (240) Air Volume Me m 3 /min (ft 3 /min) Cooling; 8.2 (290) Heating; 8.6 (305) Hi m 3 /min (ft 3 /min) Cooling; 10.0 (355) Heating; 10.5 (370) Cooling; 28.8 (1020) SHi m 3 /min (ft 3 /min) Cooling; 10.3 (365) Heating; 10.8 (380) Refrigeration Control Device Exp. Valve Refrigeration Oil cm 3 RB68A or Freol Alpha68M (400) Refrigerant (R410A) g (oz) 820 (28.9) Height mm (inch) 280 (11-1/32) 540 (21-1/4) Dimension Width mm (inch) 799 (31-15/32) 780 (30-23/32) Depth mm (inch) 183 (7-7/32) 289 (11-3/8) Net Weight kg (lbs) 9 (20) 34 (75) Pipe Diameter Gas mm (inch) 9.52 (3/8) Liquid mm (inch) 6.35 (1/4) Standard Length m (ft) 7.5 (24.6) Pipe Length Range m (ft) 3 (9.8) ~ 15 (49.2) Height Difference m (ft) 5 (16.4) Additional Gas Amount g/m (oz/ft) 20 (0.2) Refrigeration Charge Less m (ft) 7.5 (24.6) Drain Hose Inner Diameter mm 16 Length mm 650 Type Hermetic Motor Compressor Motor Type Brushless (4-pole) Rated Output W 750 Type Cross-Flow Fan Propeller Fan Material ASG20K1 PP Motor Type Transistor (8-pole) Induction (8-pole) Fan Output Power W Lo (Cool/Heat) rpm 790 / 840 Fan Speed Me (Cool/Heat) rpm 1010 / 1070 Hi (Cool/Heat) rpm 1230 / / 740 SHi (Cool/Heat) rpm 1270 /1340 4

5 Heat Exchanger Air Filter ITEM UNIT INDOOR UNIT OUTDOOR UNIT Fin Material Aluminium (Pre Coat) Aluminium Fin Type Slit Fin Corrugated Fin Row x Stage x FPI 2 x 15 x 21 2 x 24 x 17 Size (W x H x L) mm 610 x 315 x x 504 x Material P.P. Honey Comb Type One-Touch 1. Cooling capacities are based on indoor temperature of 27 C D.B. (80.6 F D.B.), 19.0 C W.B. (66.2 F W.B.) and outdoor air temperature of 35 C D.B. (95 F D.B.), 24 C W.B. (75.2 F W.B.) 2. Heating capacities are based on indoor temperature of 20 C D.B. (68 F D.B.) and outdoor air temperature of 7 C D.B. (44.6 F D.B.), 6 C W.B. (42.8 F W.B.) Item Unit ø Single Power Source (Phase, Voltage, Cycle) V 230 Hz 50 Input Power W Cooling; 460 (120 ~ 560) Heating; 620 (115 ~ 920) Starting Current A 3.0 Running Current A Cooling; 2.2 Heating; 3.0 Power Factor % Cooling; 91 Heating; 90 Power factor means total figure of compressor, indoor fan motor and outdoor fan motor. *Maximum over current protection A 4.3 Power Cord Number of core 3 (1.5 mm 2 ) Length m 1.8 Thermostat Electronic Control Protection Device Electronic Control Note Specifications are subject to change without notice for further improvement. 5

6 2.2. CS-NE9GKE CU-NE9GKE ITEM UNIT INDOOR UNIT OUTDOOR UNIT Performance Test Condition EUROVENT C kw 2.60 (0.60 ~ 3.00) Capacity O kcal/h 2240 (520 ~ 2580) O W/W 4.41 (5.00 ~ 4.00) L EER I kcal/hw 3.80 (4.33 ~ 3.44) N db (A) High 39, Low 26, Q-Lo 23 High 46 Noise Level G Power level db H kw 3.60 (0.60 ~ 5.40) Capacity E kcal/h 3100 (520 ~ 4640) A W/W 4.36 (5.22 ~ 3.97) T COP I kcal/hw 3.76 (4.52 ~ 3.41) N db (A) High 40, Low 27, Q-Lo 24 High 47 Noise Level G Power level db Moisture Removal l/h 1.6 pt/h 3.4 Lo m 3 /min (ft 3 /min) Cooling; 6.7 (240) Heating; 7.5 (265) Air Volume Me m 3 /min (ft 3 /min) Cooling; 8.7 (310) Heating; 9.4 (330) Hi m 3 /min (ft 3 /min) Cooling; 10.6 (375) Heating; 11.2 (395) Cooling; 29.8 (1050) SHi m 3 /min (ft 3 /min) Cooling; 10.9 (390) Heating; 11.5 (410) Refrigeration Control Device Exp. Valve Refrigeration Oil cm 3 RB68A or Freol Alpha68M (400) Refrigerant (R410A) g (oz) 930 (32.8) Height mm (inch) 280 (11-1/32) 540 (21-1/4) Dimension Width mm (inch) 799 (31-15/32) 780 (30-23/32) Depth mm (inch) 183 (7-7/32) 289 (11-3/8) Net Weight kg (lbs) 9 (20) 35 (77) Pipe Diameter Gas mm (inch) 9.52 (3/8) Liquid mm (inch) 6.35 (1/4) Standard Length m (ft) 7.5 (24.6) Pipe Length Range m (ft) 3 (9.8) ~ 15 (49.2) Height Difference m (ft) 5 (16.4) Additional Gas Amount g/m (oz/ft) 20 (0.2) Refrigeration Charge Less m (ft) 7.5 (24.6) Drain Hose Inner Diameter mm 16 Length mm 650 Type Hermetic Motor Compressor Motor Type Brushless (4-pole) Rated Output W 750 Type Cross-Flow Fan Propeller Fan Material ASG20K1 PP Motor Type Transistor (8-pole) Induction (8-pole) Fan Output Power W Lo (Cool/Heat) rpm 830 / 940 Fan Speed Me (Cool/Heat) rpm 1070 / 1170 Hi (Cool/Heat) rpm 1310 / / 790 SHi (Cool/Heat) rpm 1350 /

7 Heat Exchanger Air Filter ITEM UNIT INDOOR UNIT OUTDOOR UNIT Fin Material Aluminium (Pre Coat) Aluminium Fin Type Slit Fin Corrugated Fin Row x Stage x FPI 2 x 15 x 21 2 x 24 x 17 Size (W x H x L) mm 610 x 315 x x 504 x 713 Material P.P. Honey Comb Type One-Touch 1. Cooling capacities are based on indoor temperature of 27 C D.B. (80.6 F D.B.), 19.0 C W.B. (66.2 F W.B.) and outdoor air temperature of 35 C D.B. (95 F D.B.), 24 C W.B. (75.2 F W.B.) 2. Heating capacities are based on indoor temperature of 20 C D.B. (68 F D.B.) and outdoor air temperature of 7 C D.B. (44.6 F D.B.), 6 C W.B. (42.8 F W.B.) 684 Item Unit ø Single Power Source (Phase, Voltage, Cycle) V 230 Hz 50 Input Power W Cooling; 590 (120 ~ 750) Heating; 825 (115 ~ 1360) Starting Current A 3.9 Running Current A Cooling; 2.8 Heating; 3.9 Power Factor % Cooling; 92 Heating; 92 Power factor means total figure of compressor, indoor fan motor and outdoor fan motor. *Maximum over current protection A 6.3 Power Cord Number of core 3 (1.5 mm 2 ) Length m 1.8 Thermostat Electronic Control Protection Device Electronic Control Note Specifications are subject to change without notice for further improvement. 7

8 2.3. CS-NE12GKE CU-NE12GKE ITEM UNIT INDOOR UNIT OUTDOOR UNIT Performance Test Condition EUROVENT C kw 3.50 (0.60 ~ 4.00) Capacity O kcal/h 3010 (520 ~ 3440) O W/W 3.80 (5.00 ~ 3.39) L EER I kcal/hw 3.27 (4.33 ~ 2.92) N db (A) High 42, Low 29, Q-Lo 26 High 48 Noise Level G Power level db H kw 4.80 (0.60 ~ 6.60) Capacity E kcal/h 4130 (520 ~ 5680) A W/W 3.84 (5.22 ~ 3.57) T COP I kcal/hw 3.30 (4.52 ~ 3.07) N db (A) High 42, Low 33, Q-Lo 30 High 50 Noise Level G Power level db Moisture Removal l/h 2.0 pt/h 4.2 Lo m 3 /min (ft 3 /min) Cooling; 7.3 (260) Heating; 8.9 (310) Air Volume Me m 3 /min (ft 3 /min) Cooling; 9.4 (330) Heating; 10.4 (370) Hi m 3 /min (ft 3 /min) Cooling; 11.4 (400) Heating; 11.9 (420) Cooling; 31.0 (1090) SHi m 3 /min (ft 3 /min) Cooling; 11.7 (410) Heating; 12.2 (430) Refrigeration Control Device Exp. Valve Refrigeration Oil cm 3 RB68A or Freol Alpha68M (400) Refrigerant (R410A) g (oz) 970 (34.2) Height mm (inch) 280 (11-1/32) 540 (21-1/4) Dimension Width mm (inch) 799 (31-15/32) 780 (30-23/32) Depth mm (inch) 183 (7-7/32) 289 (11-3/8) Net Weight kg (lbs) 9 (20) 35 (77) Pipe Diameter Gas mm (inch) 12.7 (1/2) Liquid mm (inch) 6.35 (1/4) Standard Length m (ft) 7.5 (24.6) Pipe Length Range m (ft) 3 (9.8) ~ 15 (49.2) Height Difference m (ft) 5 (16.4) Additional Gas Amount g/m (oz/ft) 20 (0.2) Refrigeration Charge Less m (ft) 7.5 (24.6) Drain Hose Inner Diameter mm 16 Length mm 650 Type Hermetic Motor Compressor Motor Type Brushless (4-pole) Rated Output W 750 Type Cross-Flow Fan Propeller Fan Material ASG20K1 PP Motor Type Transistor (8-pole) Induction (8-pole) Fan Output Power W Lo (Cool/Heat) rpm 920 / 1120 Fan Speed Me (Cool/Heat) rpm 1175 / 1310 Hi (Cool/Heat) rpm 1430 / / 820 SHi (Cool/Heat) rpm 1470 /

9 Heat Exchanger Air Filter ITEM UNIT INDOOR UNIT OUTDOOR UNIT Fin Material Aluminium (Pre Coat) Aluminium Fin Type Slit Fin Corrugated Fin Row x Stage x FPI 2 x 15 x 21 2 x 24 x 17 Size (W x H x L) mm 610 x 315 x x 504 x 713 Material P.P. Honey Comb Type One-Touch 1. Cooling capacities are based on indoor temperature of 27 C D.B. (80.6 F D.B.), 19.0 C W.B. (66.2 F W.B.) and outdoor air temperature of 35 C D.B. (95 F D.B.), 24 C W.B. (75.2 F W.B.) 2. Heating capacities are based on indoor temperature of 20 C D.B. (68 F D.B.) and outdoor air temperature of 7 C D.B. (44.6 F D.B.), 6 C W.B. (42.8 F W.B.) 684 Item Unit ø Single Power Source (Phase, Voltage, Cycle) V 230 Hz 50 Input Power W Cooling; 920 (120 ~ 1180) Heating; 1250 (115 ~ 1850) Starting Current A 5.8 Running Current A Cooling; 4.3 Heating; 5.8 Power Factor % Cooling; 93 Heating; 94 Power factor means total figure of compressor, indoor fan motor and outdoor fan motor. *Maximum over current protection A 8.4 Power Cord Number of core 3 (1.5 mm 2 ) Length m 1.8 Thermostat Electronic Control Protection Device Electronic Control Note Specifications are subject to change without notice for further improvement. 9

10 3 Features Product - Four modes of operation selection - Powerful mode to reach the desired room temperature quickly with full power and a strong airflow - Quiet mode to provide a quiet environment by reducing the indoor unit operating airflow sound - 24-hour ON Timer and OFF Timer setting - Air swing manual and automatic adjusted by Remote Control for vertical airflow and the horizontal airflow direction louvers can be adjusted manually by hand - Super Alleru-Buster Filter prevent the growth of bacteria, viruses trapped, trap dust, tobacco smoke and tiny particles. - Long installation piping up to 15 meter. - +8/10 C HEAT operation is designed to provide heating at low temperature settings. It is used in houses unoccupied during winter, for the purpose of protecting equipments or housing appliances which may be destroyed by the extreme cold weather. - New Auto Mode operation control depends only on the indoor unit intake temperature Serviceability Improvement - Removable and washable Front Panel - Breakdown Self Diagnosis function Environmental Protection - Non-ozone depletion substances refrigerant (R410A) Operation Improvement - Random auto restart control after power failure for safety restart operation - Advanced inverter technology provides outstanding energy efficiency and powerful, flexible, comfortable operation Operation Condition - Use this air conditioner under the following temperature range. Temperature ( C) Indoor Outdoor *DBT *WBT *DBT *WBT COOLING Maximum Minimum HEATING Maximum Minimum /10 C Maximum HEAT Minimum *DBT: Dry bulb temperature *WBT: Wet bulb temperature - This unit is still able to operate as a cooler with outdoor temperature as low as -15 C in a non-living room, such as a computer room, with a room temperature of 16 C or above, and room humidity up to 80%. - During cooling operation, when the outdoor temperature drops below -15 C, compressor will be cut off and resume operation again once the temperature rises more than -15 C. 10

11 4 Location of Controls and Components 4.1. Product Overview Indoor Unit Outdoor Unit Remote Control 11

12 5 Dimensions 5.1. Indoor Unit 12

13 5.2. Outdoor Unit 13

14 6 Refrigeration Cycle Diagram Model Gas Piping size Liquid Rated Length (m) Common Length (m) Max. Elevation (m) Min. Piping Length (m) Max. Piping Length (m) If piping length is over common length, additional refrigerant should be added as shown in the table. Additional Refrigerant (g/m) NE7GK, NE9GK 3/8 1/ NE12GK 1/2 1/

15 7 Block Diagram 15

16 8 Wiring Connection Diagram 8.1. Indoor Unit 16

17 8.2. Outdoor Unit 17

18 9 Electronic Circuit Diagram 9.1. Indoor Unit 18

19 9.2. Outdoor Unit 19

20 10 Printed Circuit Board Indoor Unit Main Printed Circuit Board 20

21 Power Printed Circuit Board Indicator Panel 21

22 10.2. Outdoor Unit Main Printed Circuit Board 22

23 11 Installation Instruction Select The Best Location INDOOR UNIT There should not be any heat source or steam near the unit. There should not be any obstacles blocking the air circulation. A place where air circulation in the room is good. A place where drainage can be easily done. A place where noise prevention is taken into consideration. Do not install the unit near the door way. Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles. Recommended installation height for indoor unit shall be at least 2.5 m Indoor/Outdoor Unit Installation Diagram OUTDOOR UNIT If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from the condenser is not obstructed. There should not be any animal or plant which could be affected by hot air discharged. Keep the spaces indicated by arrows from wall, ceiling, fence or other obstacles. Do not place any obstacles which may cause a short circuit of the discharged air. If piping length is over the rated length, additional refrigerant should be added as shown in the table. Model Piping size Gas Liquid Rated Length (m) Max Elevation (m) Min. Piping Length (m) Max. Piping Length (m) Additional Refrigerant (g/m) NE7GK, NE9GK 3/8 1/ NE12GK 1/2 1/ Example: For NE7GK If the unit is installed at 10 m distance, the quantity of additional refrigerant should be 50g... (10-7.5) m x 20 g/m = 50 g 23

24 11.3. Indoor Unit HOW TO FIX INSTALLATION PLATE The mounting wall is strong and solid enough to prevent it from the vibration TO DRILL A HOLE IN THE WALL AND INSTALL A SLEEVE OF PIPING 1. Insert the piping sleeve to the hole. 2. Fix the bushing to the sleeve. 3. Cut the sleeve until it extrudes about 15 mm from the wall. The centre of installation plate should be at more than 450 mm at right and left of the wall. The distance from installation plate edge to ceiling should more than 67 mm. From installation plate left edge to unit s left side is 74 mm. From installation plate right edge to unit s right is 94 mm. Caution When the wall is hollow, please be sure to use the sleeve for tube ass y to prevent dangers caused by mice biting the connecting cable. 4. Finish by sealing the sleeve with putty or caulking compound at the final stage. : For left side piping, piping connection for liquid should be about 15 mm from this line. : For left side piping, piping connection for gas should be about 45 mm from this line. : For left side piping, piping connection cable should be about 800 mm from this line. 1. Mount the installation plate on the wall with 5 screws or more. (If mounting the unit on the concrete wall, consider using anchor bolts.) Always mount the installation plate horizontally by aligning the marking-off line with the thread and using a level gauge. 2. Drill the piping plate hole with ø70 mm hole-core drill. Line according to the left and right side of the installation plate. The meeting point of the extended line is the centre of the hole. Another method is by putting measuring tape at position as shown in the diagram above. The hole centre is obtained by measuring the distance namely 150 mm and 125 mm for left and right hole respectively. Drill the piping hole at either the right or the left and the hole should be slightly slanted to the outdoor side INDOOR UNIT INSTALLATION 1. For the right rear piping 2. For the right and right bottom piping 24

25 3. For the embedded piping (This can be used for left rear piping and left bottom piping also.) 25

26 CONNECT THE CABLE TO THE INDOOR UNIT 1. The inside and outside connecting cable can be connected without removing the front grille. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed mm 2 flexible cord, type designation 245 IEC 57 or heavier cord. Ensure the colour of wires of outdoor unit and the terminal Nos. are the same to the indoor s respectively. Earth lead wire shall be longer than the other lead wires as shown in the figure for the electrical safety in case of the slipping out of the cord from the anchorage. Secure the cable onto the control board with the holder (clamper). 26

27 11.4. Outdoor Unit INSTALL THE OUTDOOR UNIT After selecting the best location, start installation according to Indoor/Outdoor Unit Installation Diagram. 1. Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø10 mm). 2. When installing at roof, please consider strong wind and earthquake. Please fasten the installation stand firmly with bolt or nails CONNECTING THE PIPING Connecting The Piping To Indoor Unit Please make flare after inserting flare nut (locate at joint portion of tube assembly) onto the copper pipe (in case of using long piping). Connect the piping Align the center of piping and sufficiently tighten the flare nut with fingers. Further tighten the flare nut with torque wrench in specified torque as stated in the table. Model Piping size (Torque) Gas Liquid NE7GK,NE9GK 3/8 [42 N l m] 1/4 [18 N l m) NE12GK 1/2 [55 Nm] l 1/4 [18 Nm) l Do not over tighten, over tightening cause gas leakage. Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (locate at valve) onto the copper pipe. Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table. CUTTING AND FLARING THE PIPING 1. Please cut using pipe cutter and then remove the burrs. 2. Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end down to avoid the metal powder entering the pipe. 3. Please make flare after inserting the flare nut onto the copper pipes. CAUTION 27

28 EVACUATION OF THE EQUIPMENT WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way valve. Be sure to connect the end of the charging hose with the push pin to the service port. 2. Connect the center hose of the charging set to a vacuum pump with check valve, or vacuum pump and vacuum pump adaptor. 3. Turn on the power switch of the vacuum pump and make sure that the needle in the gauge moves from 0 cmhg (0 MPa) to -76 cmhg (-0.1 MPa). Then evacuate the air approximately ten minutes. 4. Close the Low side valve of the charging set and turn off the vacuum pump. Make sure that the needle in the gauge does not move after approximately five minutes. Note: BE SURE TO FOLLOW THIS PROCEDURE IN ORDER TO AVOID REFRIGERANT GAS LEAKAGE. 5. Disconnect the charging hose from the vacuum pump and from the service port of the 3-way valve. 6. Tighten the service port caps of the 3-way valve at a torque of 18 N l m with a torque wrench. 7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to OPEN using a hexagonal wrench (4 mm). 8. Mount valve caps onto the 2-way valve and the 3-way valve. Be sure to check for gas leakage. CAUTION If gauge needle does not move from 0 cmhg (0 MPa) to -76 cmhg (-0.1 MPa), in step above take the following measure: If the leak stops when the piping connections are tightened further, continue working from step. If the leak does not stop when the connections are retightened, repair the location of leak. Do not release refrigerant during piping work for installation and reinstallation. Take care of the liquid refrigerant, it may cause frostbite CONNECT THE CABLE TO THE OUTDOOR UNIT (FOR DETAIL REFER TO WIRING DIAGRAM AT UNIT) 1. Remove the control board cover from the unit by loosening the screw. 2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 5 x 1.5 mm 2 flexible cord, type designation 245 IEC 57 or heavier cord. 3. Secure the cable onto the control board with the holder (clamper). 4. Attach the control board cover back to the original position with the screw. 28

29 PIPE INSULATION 1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap the insulated piping end to prevent water from going inside the piping. 2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAM with thickness 6 mm or above NEW AUTO MODE SELECTION This control depends only on the Indoor intake temperature during its mode selection judgement. Outdoor intake temperature does not affect the judgement. The New Auto Mode Control can be selected by cutting the jumper JX1 in the Indoor Printed Circuit Board (PCB). 29

30 12 Operation and Control Basic Function Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that judging the condition according to internal setting temperature and intake air temperature Internal Setting Temperature Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes. These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit Cooling Operation Thermostat control Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5 C. Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF point Soft Dry Operation Thermostat control Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.0 C. Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF point Heating Operation Thermostat control Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +2.0 C. Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF point. 30

31 Automatic Operation This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode, indoor intake air temperature and outdoor air temperature. During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30 seconds to detect the indoor intake and outdoor air temperature. The operation mode is decided based on below chart. Every 30 minutes, the indoor and outdoor temperature is judged. Based on remote control setting temperature, the value of T1 will increase up to 10 C, T2 will decrease by 3 C and T3 will decrease up to 8 C. The Auto Operation Mode shifting will take place whenever operation mode changed from Cool/Soft Dry to Heating or vice versa New Automatic Operation This New Auto mode control can be selected by cutting jumper (JX1) located on the indoor main printed circuit board as shown in the diagram below. This New Auto mode can be set using remote control and the operation is decided by remote control setting temperature, remote control operation mode and indoor intake air temperature. During operation mode judgment, indoor fan motor (with speed of Lo-) to detect the indoor intake air temperature. Judgments take place every 30 minutes. The operation mode is judged by comparing the indoor intake temperature with remote control setting temperature. If the temperature difference between indoor intake temperature and remote control setting temperature is less than -2 C, Heating Mode will be selected. If it is over than 2 C, Cooling Mode will be selected, else Soft Dry Mode will be selected. 31

32 Indoor Fan Motor Operation A. Basic Rotation Speed i. Manual Fan Speed [Cooling, Dry] Fan motor s number of rotation is determined according to remote control setting. Remote Control O O O O O Tab PSHi SHi Hi Me+ Me Me- Lo Lo- SLo SSLo [Heating] Fan motor s number of rotation is determined according to remote control setting. Remote Control O O O O O Tab PSHi SSHi SHi Me+ Me Me- Lo Lo- SLo SSLo ii. Auto Fan Speed [Cooling, Dry] According to room temperature and setting temperature, indoor fan speed is determined automatically. The indoor fan will operate according to pattern below. [Heating] According to indoor pipe temperature, automatic heating fan speed is determined as follows. B. Feedback control Immediately after the fan motor started, feedback control is performed once every second. During fan motor on, if fan motor feedback 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fan motor error is detected. Operation stops and cannot on back. 32

33 Outdoor Fan Motor Operation Outdoor fan motor is operated with 15 fan speed number of rotations. It starts when compressor starts operation and it stops 30 seconds after compressor stops operation Airflow Direction 1. There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes). 2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control) Vertical Airflow Heating Operation Mode Airflow Direction Vane Angle ( ) Auto with Heat Exchanger Temperature A Upward fix 27 B Downward fix 70 C Upward fix 27 D Downward fix 27 Manual Cooling and Ion Auto (Anti-Dew Control) 27 ~ 49 (30 ~ 39) Manual (Anti-Dew Control) 27 (30) 34 (32) 39 (35) 44 (37) 49 (39) Soft Dry Auto (Anti-Dew Control) 27 ~ 49 (30 ~ 39) Manual (Anti-Dew Control) 27 (30) 34 (32) 39 (35) 44 (37) 49 (39) 1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1 below. When the air conditioner is stopped using remote control, the vane will shift to close position. 2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close position. 33

34 Horizontal Airflow The horizontal airflow direction louvers can be adjusted manually by hand Quiet operation (Cooling Mode/Cooling area of Dry Mode) A. Purpose To provide quiet cooling operation compare to normal operation. B. Control condition a. Quiet operation start condition When quiet button at remote control is pressed. Quiet LED illuminates. b. Quiet operation stop condition 1. When one of the following conditions is satisfied, quiet operation stops: a. Powerful button is pressed. b. Stop by OFF/ON switch. c. Timer off activates. d. Quiet button is pressed again. 2. When quiet operation is stopped, operation is shifted to normal operation with previous setting. 3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed. 4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode. 5. During quiet operation, if timer on activates, quiet operation maintains. 6. After off, when on back, quiet operation is not memorised. C. Control contents 1. Fan speed is changed from normal setting to quiet setting of respective fan speed. This is to reduce sound of Hi, Me, Lo for 3dB (Some models more than 3dB). 2. Fan speed for quiet operation is -1 step from setting fan speed Quiet operation (Heating) A. Purpose To provide quiet heating operation compare to normal operation. B. Control condition a. Quiet operation start condition When quiet button at remote control is pressed. Quiet LED illuminates. b. Quiet operation stop condition 1. When one of the following conditions is satisfied, quiet operation stops: a. Powerful button is pressed. b. Stop by OFF/ON switch. c. Timer off activates. d. Quiet button is pressed again. 2. When quiet operation is stopped, operation is shifted to normal operation with previous setting. 3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed. 4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode, expect fan only mode. 5. During quiet operation, if timer on activates, quiet operation maintains. 6. After off, when on back, quiet operation is not memorised. C. Control contents a. Fan Speed manual 1. Fan speed is changed from normal setting to quiet setting of respective fan speed. This is to reduce sound of Hi, Me, Lo for 3dB. 2. Fan speed for quiet operation is -1 step from setting fan speed. 3. Fan Speed Auto Indoor FM RPM depends on pipe temp sensor of indoor heat exchanger. 34

35 Powerful Mode Operation When the powerful mode is selected, the internal setting temperature will shift higher up to 3.5 C (Heating Operation) or lower up to 2 C (Cooling/Soft Dry Operation) than remote control setting temperature for 20 minutes to achieve the setting temperature quickly ON Timer Control ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is to provide a comfortable environment when reaching the set ON time. 60 minutes before the set time, indoor (at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the operation starting time. From the above judgment, the decided operation will start operate earlier than the set time as shown below OFF Timer Control OFF timer can be set using remote control, the unit with timer set will stop operate at set time Auto Restart Control 1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four minutes (there are 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be selected randomly) after power supply resumes. 2. This type of control is not applicable during ON/OFF Timer setting Indication Panel LED POWER TIMER QUIET POWERFUL +8/10 C HEAT Color Green Orange Orange Orange Green Light ON Operation ON Quiet Setting ON Quiet Mode ON Powerful Mode ON ON Light OFF Operation OFF Quiet Setting OFF Quiet Mode OFF Powerful Mode OFF OFF Note: If POWER LED is blinking, the possible operation of the unit are Hot Start, during Deice operation, operation mode judgment, or ON timer sampling. If Timer LED is blinking, there is an abnormality operation occurs. 35

36 /10 C Heat Operation 1. This +8/10 C Heat mode is designed to provide heating at low setting temperature in unoccupied houses during winter for the purpose of protecting equipments or housing appliances which may be destroyed by the extreme cold weather. 2. This operation mode can be selected by pressing the +8/10 C heat button on the remote control. 3. Two temperature settings are available. The temperature are; a. 8 C (Pressing TEMP down button at the remote control) b. 10 C (Pressing TEMP up button at the remote control) 4. During the operation of this mode; a. The indoor fan speed will remain at Hi fan tap all the time included deice process. b. Powerful operation, Quiet operation and Fan Speed selection are disabled. c. Omission of cold draft prevention control. 5. Control condition; Caution! If the indoor temperature constantly is less than 0 C (Door, windows not close properly), the error code F11 may occur. This is because in open area, the indoor sensor will misjudge operation condition and will give error code. 36

37 12.2. Protection Control Protection Control For All Operations Time Delay Safety Control 1. The compressor will not start for 3 minutes after stop of the operation. 2. This control is not applicable if the power supply is cut off and on again or after 4-way valve deices condition Seconds Forced Operation 1. Once compressor starts the operation, it will not stop its operation for 30 seconds. 2. However, it can be stopped with the remote control or the Auto Switch on the indoor unit Total Running Current Control 1. When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor operation will be decreased. 2. If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased. 3. However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3 minutes. Model NE7GK NE9GK NE12GK Operation Mode X (A) Y (A) X (A) Y (A) X (A) Y (A) Cooling/Soft Dry (A) Cooling/Soft Dry (B) Cooling/Soft Dry (C) Heating The first 30 minutes of cooling operation, (A) will be applied IPM (Power transistor) Prevention Control A. Overheating Prevention Control 1. When the IPM temperature rises to 100 C, compressor operation will stop immediately. 2. Compressor operation restarts after 3 minutes the temperature decreases to 95 C. B. DC Peak Current Control 1. When electric current to IPM exceeds set value of 20.2 A, the compressor will stop operate. Then, operation will restart after 3 minutes. 2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after 1 minute. 3. If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after 2 minutes. If this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off. 37

38 Compressor Overheating Prevention Control Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency are as below. If compressor discharge temperature exceeds 110 C, compressor will be stopped, occurs 4 times per 20 minutes, timer LED will be blinking. ( F97 is to be confirmed.) Low Pressure Prevention Control (Gas Leakage Detection) a. Control start conditions For 5 minutes, the compressor continuously operates and outdoor total current is between 0.6A and 1.15A. During Cooling and Soft Dry operations: Indoor suction temperature - indoor piping temperature is below 4 C. During Heating operations: Indoor piping temperature - indoor suction is under 5 C. b. Control contents Compressor stops (and restart after 3 minutes). If the conditions above happen 2 times within 20 minutes, the unit will: - Stop operation - Timer LED blinks and F91 indicated Low Frequency Protection Control 1 When the compressor operate at frequency lower than 25 Hz continued for 240 minutes, the operation frequency will be changed to 24 Hz for 2 minutes Low Frequency Protection Control 2 When all the below conditions comply, the compressor frequency will changed to lower frequency. Temperature, T, for: Cooling/Soft Dry Heating Indoor intake air ( C) T < 14 or T 30 T < 14 or T 28 Outdoor air ( C) T < 13 or T 38 T < 4 or T 24 Indoor heat exchanger ( C) T < 30 T 0 38

39 Protection Control For Cooling & Soft Dry Operation Outdoor Air Temperature Control The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below. This control will begin 1 minute after the compressor starts Cooling Overload Control Detects the Outdoor pipe temperature and carry out below restriction/limitation (Limit the compressor Operation frequency) The compressor stop if outdoor pipe temperature exceeds 63 C If the compressor stops 4 times in 20 minutes, Timer LED blinking (F95: outdoor high pressure rise protection) Freeze Prevention Control 1. When indoor heat exchanger temperature is lower than 0 C continuously for 6 minutes, compressor will stop operating. 2. Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 13 C. 3. At the same time, indoor fan speed will be higher than during its normal operation. 4. If indoor heat exchanger temperature is higher than 13 C for 5 minutes, the fan speed will return to its normal operation. 39

40 Protection Control For Heating Operation Intake Air Temperature Control Compressor will operate at Max freq. if either one of the below conditions occur: 1. When the indoor intake air temperature is 30 C or above Outdoor Air Temperature Control The Max current value is regulated when the outdoor air temperature rise above 14 C in order to avoid compressor overloading Overload Protection Control The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown in below. If the heat exchanger temperature exceeds 60 C, compressor will stopped. 40

41 13 Servicing Mode Auto OFF/ON Button This button is used to pump doen the air conditioner during servicing or transferring of outdoor unit. 1. It can be used to operate air conditioner in limited function if remote control is misplaced or malfunction. Auto operation will start when Auto OFF/ON Button is pressed and released within 5 seconds. Within 5 minutes of each operation, if the Auto OFF/ON Button is pressed again for more than 5 seconds the air conditioner will switch to another operation after Beep sound. 2. The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air conditioner operation. Press and hold AUTO OFF/ON Button for more than 5 seconds, the air conditioner always operate force cooling operation. Press and hold AUTO OFF/ON Button until 2 Beep sounds are heard, the force heating operation is at standby condition. Press and hold AUTO OFF/ON Button until 3 Beep sounds are heard, the various setting mode is at standby condition. Press and hold AUTO OFF/ON Button until 4 Beep sounds are heard, the individual correspondence mode is at standby condition. During standby condition, when the indoor unit receives AC RESET signal (Beep sound is heard) from remote control, the corresponding mode will be activated. 3. REMOTE CONTROL NUMBER SWITCH MODE The Remote Control Number Switch Mode will be activated if the Auto OFF/ON button is pressed continuously for more than 11 seconds (3 beep sounds will occur at 11th seconds to identify the Remote Control Number Switch Mode is in standby condition) and press AC Reset button and press any button at remote control to transmit and store the desired transmission code to the EEPROM. For transmission code selection explanation, please refer to Select Remote Control Transmission Code. 4. REMOTE CONTROL RECEIVING SOUND OFF/ON MODE The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed continuously for more than 16 seconds (4 beep sounds will occur at 16th seconds to identify the Remote Control Receiving Sound Off/On 41

42 Mode is in standby condition) and press AC Reset button and then press Check button at remote control. Press Auto OFF/ON button to toggle remote control receiving sound. - Short beep : Turn OFF remote control receiving sound. - Long beep : Turn ON remote control receiving sound. After Auto OFF/ON Button is pressed, the 20 seconds counter for Remote Control Receiving Sound OFF/ON Mode is restarted Select Remote Control Transmission Code There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor unit. The indoor unit will only operate when received signal with same transmission code from remote control. This could prevent signal interference when there are 2 or more indoor units installed nearby together. To change remote control transmission code, short or open jumpers at the remote control printed circuit board. Remote Control Printed Circuit Board Jumper A (J-A) Jumper B (J-B) Remote Control No. Short Open A (Default) Open Open B Short Short C Open Short D Remote Control Button SET BUTTON To check current remote control transmission code - Press for more than 10 seconds CLOCK BUTTON To change the remote control s time format - Press for more than 5 seconds RESET (RC) To clear and restore the remote control setting to factory default - Press once to clear the memory RESET (AC) To restore the unit s setting to factory default - Press once to restore the unit s setting TIMER To change indoor unit indicator s LED intensity - Press continuously for 5 seconds TIMER To change remote control display from Degree Celsius to Degree Fahrenheit. - Press continuously for 10 seconds. 42

43 14 Troubleshooting Guide Refrigeration Cycle System In order to diagnose malfunctions, make sure that there are no electrical problems before inspecting the refrigeration cycle. Such problems include insufficient insulation, problem with the power source, malfunction of a compressor and a fan. The normal outlet air temperature and pressure of the refrigeration cycle depends on various conditions, the standard values for them are shown in the table on the right. 43

44 Relationship between the condition of the air conditioner and pressure and electric current Cooling Mode Heating Mode Condition of the air conditioner Low Pressure High Pressure Electric current during operating Low Pressure High Pressure Electric current during operating Insufficient refrigerant (gas leakage) Clogged capillary tube or Strainer Short circuit in the indoor unit Heat radiation deficiency of the outdoor unit Inefficient compression Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is started. 44

45 14.2. Breakdown Self Diagnosis Function Self Diagnosis Function (Three Digits Alphanumeric Code) Once abnormality has occurred during operation, the unit will stop its operation, and Timer LED blinks. Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown condition, the LED will light up again. In operation after breakdown repair, the Timer LED will no more blink. The last error code (abnormality) will be stored in IC memory. To make a diagnosis 1. Timer LED start to blink and the unit automatically stops the operation. 2. Press the CHECK button on the remote controller contiguously for 5 seconds will be displayed on the remote controller display. Note: Display only for - -. (No transmitting signal, no receiving sound and no Power LED blinking.) 4. Press the TIMER or button on the remote controller. The code H00 (no abnormality) will be displayed and signal will be transmitted to the main unit. 5. Every press of the button (up or down) will increase abnormality numbers and transmit abnormality code signal to the main unit. 6. When the latest abnormality code on the main unit and code transmitted from the remote controller are matched, power LED will light up for 30 seconds and a beep sound (continuously for 4 seconds) will be heard. If no codes are matched, power LED will light up for 0.5 seconds and no sound will be heard. 7. The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5 seconds or operating the unit for 30 seconds. 8. The LED will be off if the unit is turned off or the RESET button on the main unit is pressed. To display memorized error (Protective operation) status 1. Turn power on. 2. Press the CHECK button on the remote controller contiguously for 5 seconds will be displayed on the remote controller display. Note: Display only for - -. (No transmitting signal, no receiving sound and no Power LED blinking.) 4. Press the TIMER or button on the remote controller. The code H00 (no abnormality) will be displayed and signal will be transmitted to the main unit. The power LED lights up. If no abnormality is stored in the memory, three beeps sound will be heard. 5. Every press of the button (up or down) will increase abnormality numbers and transmit abnormality code signal to the main unit. 6. When the latest abnormality code on the main unit and code transmitted from the remote controller are matched, power LED will light up for 30 seconds and a beep sound (continuously for 4 seconds) will be heard. If no codes are matched, power LED will light up for 0.5 seconds and no sound will be heard. 7. The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5 seconds or operating the unit for 30 seconds. 8. The same diagnosis can be repeated by turning power on again. To clear memorized error (Protective operation) status after repair: 1. Turn power on. 2. Press the AUTO button for 5 seconds (A beep receiving sound) on the main unit to operate the unit at Forced Cooling Operation modes. 3. Press the CHECK button on the remote controller for about 1 second with a pointed object to transmit signal to main unit. A beep sound is heard from main unit and the data is cleared. Temporary Operation (Depending on breakdown status) 1. Press the AUTO button (A beep receiving sound) on the main unit to operate the unit. (Remote control will become possible.) 2. The unit can temporarily be used until repaired. Error Code Operation Temporary items H23 Cooling Emergency Operation H27, H28 Cooling, Heating with limited power 45

46 14.3. Error Codes Table Diagnosis display Abnormality / Protection control Note: O - Frequency measured and fan speed fixed. Abnormality Judgement Emergency operation H00 No abnormality detected Normal operation H11 Indoor / outdoor abnormal > 1 min after starting Indoor fan operation communication operation only H14 H15 H16 Indoor intake air temperature sensor abnormality Outdoor compressor temperature sensor abnormality Outdoor Current Transformer open circuit H19 Indoor fan motor merchanism lock 7 times occurrance continuously. H23 Indoor heat exchanger temperature Continue for 5 sec. sensor abnormality H24 H27 H28 H30 Indoor heat exchanger temperature sensor 2 abnormality Outdoor air temperature sensor abnormality Outdoor heat exchanger temperature sensor abnormality Outdoor discharge air temperature sensor abnormality Primary location to verify Internal / external cable connections Indoor / Outdoor PCB Continue for 5 sec. Intake air temperature sensor (detective or disconnected) Continue for 5 sec. Compressor temperature sensor (detective or disconnected) Outdoor PCB IPM (Power transistor) module Indoor PCB Fan motor O (Cooling only) Heat exchanger temperature sensor (defective or disconnected) Continue for 5 sec. Heat exchanger temperature sensor 2 (defective or disconnected) Continue for 5 sec. O Outdoor temperature sensor (defective or disconnected) Continue for 5 sec. O Outdoor heat exchanger temperature sensor (defective or disconnected) Continue for 5 sec. Outdoor temperature sensor (defective or disconnected) H33 Indoor/Outdoor wrong connection Indoor/Outdoor supply voltage H38 Indoor/outdoor mismatch (brand code) H97 Outdoor fan motor mechanism locked 2 times occurrance within 30 minutes Outdoor PCB Outdoor fan motor H98 Indoor high pressure protection Air filter dirty Air circulation short circuit H99 F11 Indoor heat exchanger anti-freezing protection Cooling / Heating cycle changeover abnormality Insufficient refrigerant Air filter dirty 4 times occurance within 30 minutes F90 PFC control 4 times occurance within 20 minutes F91 Refrigeration cycle abnormal 2 times occurance within 20 minutes F93 Outdoor compressor abnormal revolution 4 times occurance within 20 minutes F95 Cool high pressure protection 4 times occurance within 20 minutes F96 F97 IPM (power transistor) overheating protection Outdoor compressor overheating protection 4-way valve V-coil Voltage at PFC No refrigerant (3-way valve is closed) Outdoor compressor Outdoor refrigerant circuit Excess refrigerant Improper heat radiation IPM (Power transistor) 4 times occurance within 20 minutes F98 Total running current protection 3 times occurance within 20 minutes F99 Outdoor Direct Current (DC) peak detection 7 times occurance continuously Insufficient refrigerant Compressor Excess refrigerant Improper heat radiation Outdoor PCB IPM (Power transistor) Compressor The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until beep sound heard following by pressing the CHECK button at Remote Control. Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors (refer to Error Codes Table) by using Remote Control or Auto Switch at indoor unit. However, the Remote Control signal receiving sound is changed from one beep to four beep sounds. 46

47 15 Disassembly and Assembly Instructions High voltages are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor Removal Procedures To remove the Front Grille Lift to open the vertical vent gently. Remove the 2 caps and 2 screws at the bottom of discharge vent. (Fig. 1) Remove the Front Grille by releasing the 3 hooks at the top of the Front Grille. Hold both sides of the Front Grille and remove it by pulling up and towards you gently. (Fig. 1) To remove the Main Electronic Controller Fig. 1 Unhook the tabs at the Control Board to remove the Control Board Cover. (Fig. 2) Fig. 2 Release the Indicator by detaching the CN-DISP, then remove the Indicator from the 2 tabs. (Fig. 3) Fig. 3 47

48 Press the Hold to the right side, remove the Particular Piece and slide out the Main Electronic Controller (Fig. 4). Fig. 4 Release the CN-DATA. (Fig. 5) Release the CN-TH. (Fig.5) Release the CN-STM1. (Fig.5) To remove the Power Electronic Controller Fig. 5 Release the 2 screws for the Earth wire. (Fig. 6) Pull out 4 terminal wires (Black,Blue, Red and Yellow) from the Terminal Board. (Fig. 6) Detach the Terminal Board from the Control Board. (Fig. 6) Press the Hold to the left side, remove the Particular Piece and slide out the Power Electronic Controller. (Fig. 6) Fig. 6 Release the AC-301 (BRW) connector. (Fig. 7) Release the AC-303 (WHT) connector. (Fig. 7) Release the CN-FM connector. (Fig. 7) Fig. 7 48

49 To remove the Discharge Grille Pull out the Drain Hose (behind the Discharge Grille) from outlet to remove the Discharge Grille. (Fig. 8) To remove the Control Board Fig. 8 Release the 3 screws. (Fig. 9) By pressing down the hook at the left side of Control Board, you will be able to remove the Control Board. (Fig. 9) To remove the Cross Flow Fan and Indoor Fan Motor Fig. 9 Remove the screw at the Cross Flow Fan. (Fig 10) Reminder:- To reinstall the Fan Motor, please adjust the connector location to 45 with Fan Motor before fixing Control Board. (Fig. 10) Fig. 10 Remove the Bearing. (Fig. 11) Remove the screw at the left of the Evaporator. (Fig. 11) Press the Hold to the left side then you can release the Evaporator. (Fig. 11) Fig

50 Lift up the Evaporator and remove the Cross Flow Fan from the unit by pulling it to the left and downward. Fan Motor can be removed after the removal of the Cross Flow Fan (Fig. 12) Fig

51 15.2. Outdoor Electronic Controller Removal Procedure Caution! When handling electronic controller, be careful of electrostatic discharge. 1. Remove the 3 screws of the Top Panel. 5. Remove the Control Board as follows: Fig Remove the 6 screws of the Front Panel. Fig. 4 Fig Remove the screw of the Terminal Board Cover. 4. Remove the Top Cover of the Control Board by 4 hooks. Fig. 5 Fig. 6 Fig. 3 51

52 16 Technical Data Operation Characteristics CS-NE7GKE CU-NE7GKE A. Cool: Outdoor Temperature Change Indoor Temp.: 27/19 C Remote Con.: HI FAN, COOL 16 C Comp. Hz: Rated Cooling Voltage: 230 V 52

53 53

54 B. Cool: Piping Length Change Indoor Temp.: 27/19 C, 35/- C Remote Con.: HI FAN, COOL 16 C Comp. Hz: Rated Cooling Voltage: 230 V 54

55 55

56 C. Heat: Outdoor Temperature Change Indoor Temp.: 20/- C Remote Con.: HI FAN, HEAT 30 C Comp. Hz: Rated Heating Voltage: 230 V 56

57 57

58 D. Heat: Piping Length Change Indoor Temp.: 20/- C, 7/6 C Remote Con.: HI FAN, HEAT 30 C Comp. Hz: Rated Heating Voltage: 230 V 58

59 59

60 CS-NE9GKE CU-NE9GKE A. Cool: Outdoor Temperature Change Indoor Temp.: 27/19 C Remote Con.: HI FAN, COOL 16 C Comp. Hz: Rated Cooling Voltage: 230 V 60

61 61

62 B. Cool: Piping Length Change Indoor Temp.: 27/19 C, 35/- C Remote Con.: HI FAN, COOL 16 C Comp. Hz: Rated Cooling Voltage: 230 V 62

63 63

64 C. Heat: Outdoor Temperature Change Indoor Temp.: 20/- C Remote Con.: HI FAN, HEAT 30 C Comp. Hz: Rated Heating Voltage: 230 V 64

65 65

66 D. Heat: Piping Length Change Indoor Temp.: 20/- C, 7/6 C Remote Con.: HI FAN, HEAT 30 C Comp. Hz: Rated Heating Voltage: 230 V 66

67 67

68 CS-NE12GKE CU-NE12GKE A. Cool: Outdoor Temperature Change Indoor Temp.: 27/19 C Remote Con.: HI FAN, COOL 16 C Comp. Hz: Rated Cooling Voltage: 230 V 68

69 69

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